Effectiveness of the nacelle anti-corrosion systems are good. Air tight systems and salty particle removal filters done good works. Additional atmospheric corrosion monitor is installed to the MET mast and it is under observation.
Camera for lightning observation system is installed and it is under operation.
Effectiveness of the erosion protection systems for blades are under observation. Since the peeling of the protection coating is observed on the leading edge of one blade tip, it was repaired.

2) Research and development of the foundation :

Field survey was conducted to investigate the present state of the seafloor. By comparing the profile of the seabed and that obtained last year, it was confirmed that the scour protection has been stable.

5) Construction of submarine cable, power system interconnection and transformation :

In 2015, as a recovery of damaged undersea cable , a new undersea cable was constructed based on new design technique that is also focused on considered impulsive breaking wave force is acting on wall surface of the foundation.

6) Development of Operation & Maintenance Technology :

The demonstration and research tests about the improvements of maintenance systems have been done and have got good know-hows about automatic lubrication system. Grease supply interval of automatic lubrication system for blade bearing is optimized.
Effectiveness of the improvements of control systems is good. Time availability of wind turbine was improved better by the enhanced program.
CMS (Condition Monitoring Systems) shows that every data is in regular band. Additional portable camera is installed in nacelle and it is under observation.

7) Detailed research of the impact on environment :

Detailed research of the impact on environment has been carried focusing on the effect on the wildlife, marine life, etc.
In 2015, in addition to the previous research, the underwater sound and the seabed vibration from offshore wind turbine were measured.